"Don't think I didn't realize you splashing about like a bird just to spite me. Do you want me to crawl into the bath with you, hmm? Now that you've already gotten me wet."

He's being cheeky, but Alastor is none the wiser to any double entendre he might be saying. It's not helped as he slipped away just to start unfastening his harness and unbutton his shirt, casually undressing and freeing himself from soapy wet clothes.